混凝土攪拌站中,夏季施工時,當晝夜平均氣溫高于30℃時,應對原材料、運輸設備等作以下要求:
In the concrete mixing station, when the average temperature of the day and night is higher than 30 degrees, the following requirements should be made when the average temperature of the day and night is higher than that of the raw materials and transportation equipment.
1、混凝土攪拌站對水泥、砂、石的儲存倉,堆料場進行遮陽和防曬處理,并在砂石堆上噴水降溫,以降低原材料進入攪拌機的溫度.
1, concrete mixing station for shading and sunscreen treatment of cement, sand and stone storage bin, stacking yard, and spray cooling on sand piles to reduce the temperature of raw materials entering the mixer.
2、采用冷卻裝置冷卻拌合水,對水管及水箱進行遮陽和隔熱處理,同時在拌合水中加碎冰作為拌合水的一部分.
2, the cooling device for mixing water treatment, sunshade and heat insulation of pipe and water tank, while mixing water with crushed ice as part of mixing water.
3、水泥進入攪拌機的溫度必須小于40℃.
3. The temperature of the cement into the mixer must be less than 40.
4、砼施工中因考慮坍落度損失較大,可加一定量減水劑和粉煤灰取代部分水泥,以減少水泥用量.
4. In concrete construction, a certain amount of water reducing agent and fly ash can be replaced by a certain amount of water reducing agent and fly ash to reduce the amount of cement because of the large loss of slump.
5、混凝土攪拌站的料斗、儲水器、皮帶運輸機、攪拌樓等加遮陽棚,以免被太陽暴曬,同時可以用水化熱較低的水泥進行生產砼.
5, concrete mixing plant hopper, water storage, belt conveyor, mixing building and other shading sheds, so as not to be exposed to the sun, and at the same time, the cement with low hydration heat will be used to produce concrete.
6、生產時,在棚內或氣溫較低的時間或夜間攪拌砼,以保證砼的入模溫度不高于30℃.砼運輸時,采用罐車進行運輸,盡量縮短運輸時間,但嚴禁在運輸過程中任意加水.
6, production, inside or low temperature time or at night to ensure the concrete mixing concrete, the molding temperature is not higher than 30 DEG C. Concrete transport, the tanker transport, shorten the transportation time, but not any water in the transport process.
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